PC Chrissi Thomas, from the Guildford area patrol team, said: "We are currently liaising with Sussex Police in an attempt to locate Ms Rule but urge anybody who has seen Margaret or knows of her whereabouts to call us as soon as possible so we can make sure she is well."

Surrey Police urge anyone with any information to call 101 (or 999 in an emergency) as soon as possible, quoting reference 4517004108 .